Vincas Dargis <vin...@gmail.com> added the comment:
On 2017-12-06 20:28, paul j3 wrote:
> The default value is used *if the flag is not provided at all.*
>
> "nargs='?'" provides a third option, assigning the 'const' value *if the flag
> is used without an argument
Vincas Dargis <vin...@gmail.com> added the comment:
On 2017-12-06 19:43, paul j3 wrote:
> With one flag but not its argument, I get the error that you display. That
> has nothing to do with the grouping.
>
> 0932:~/mypy/argdev$ python3 issue18943.py --ptz-get-status
> usa
Vincas Dargis <vin...@gmail.com> added the comment:
Any progress with this? I believe it would fix my use case:
```
import argparse
import pprint
parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument('--device-get-capabi
